AD 67-08-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12D | Airworthiness Directives; Fairchild-Hiller Models UH-12D and UH-12E Helicopters |
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12E | Airworthiness Directives; Fairchild-Hiller Models UH-12D and UH-12E Helicopters |
Unsafe Condition
Failure of the attachment of cyclic control bracket P/N 3301-5 to the transmission housing P/N 23542 due to bolts with torque less than 50 inch-pounds or damaged Rosan inserts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect cyclic control bracket attachment bolts for torque less than 50 inch-pounds and visually inspect Rosan inserts for cracks or damage. Replace damaged inserts and inserts with insufficient bolt torque. Remove Rosan R206SB-8 inserts, install Roson RD206SB-8 inserts, and use MS20073-04-10 bolts as per Service Information Letter No. 3054.
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Compliance Time
Within the next 10 hours' time in service after the effective date of this AD for inspection and replacement actions; within the next 100 hours' time in service after the effective date for removing Rosan inserts and installing replacements.
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Affected Aircraft
Fairchild-Hiller Models UH-12D and UH-12E Helicopters with cyclic control bracket P/N 3301-5 and transmission housing P/N 23542.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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